2015 1(16)

Back to table of content

   Short abstract

 

Pages:

124 - 128

Language:

RU

Ref.:

8


Click to get extended abstract


Download paper: [RU]

2015_1(16)_23.pdf

 

 

BUBBLE FORMATION REGIMES IN DOWNWARD FLOW OF VISCOUS LIQUID

Vorobiev M.A., Kashinskiy O.N., Lobanov P.D., Chinak A.V.

Institute of Thermophysics SB RAS, Novosibirsk, Russia


Citation:

Vorobiev, M.A., Kashinskiy, O.N., Lobanov, P.D. and Chinak, A.V., (2015) Bubble formation regimes in downward flow of viscous liquid, Modern Science: Researches, Ideas, Results, Technologies, Iss. #1(16), PP. 124 - 128.


Keywords:

two-phase flow; bubbly flow; bubble generation modes


Abstracts:

This work is devoted to the experimental study of the process of bubble detachment from a single capillary in a downward fluid flow. Glycerol was applied as working liquid. Working fluid was heated to change it physical properties. The experiment was conducted in the range of Reynolds numbers 80-300, Bond numbers 0.04 – 1.7, Morton numbers 9 10-4 – 1.7 10-6. By using video filming shadow images of flow were obtained. Video processing of the bubble detachment in the fluid flow was carried out by using the software package Matlab. During the experiment were obtained relationships of the bubbles average diameter of the gas flow, as well as the velocity and temperature of the fluid. The different modes of gas-liquid bubble mixture formation were found including modes which allow to receive both monodisperse and bidisperse gas-liquid mixture. It is shown that the process of bubble coalescence near the capillary is the cause of bubble size distribution type.


References:

  1. Jiacai Lu, Gretar Tryggvason. Effect of bubble deformability in turbulent bubbly upflow in a vertical channel. // Physics of Fluids 20. 040701 (2008).

  2. Liu Liu, Hongjie Yan, Guojian Zhao. Experimental studies on the shape and motion of air bubbles in viscous liquids // Experimental Thermal and Fluid Science 62 (2015) 109-121

  3. Кутателадзе С.С., Стырикович М.А. Гидравлика газожидкостных систем. М.: Энергия, 1976, 296 с.

  4. Hua Bai, Brian G. Thomas. Bubble formation during horizontal gas injection into downward-flowing liquid // Metallurgical and materials transactions B, Volume 32B, December 2001-1159

  5. Marshall S.H., Chudachek M.W.; A Model for bubble formation from an orifice with liquid cross-flow.// Chemical Engineering Science, Voi. 48, No. 11, pp. 2049-2059, 1993.

  6. Sina Ghaemi, Payam Rahim, David S. Nobes. The effect of gas-injector location on bubble formation in liquid cross flow. Physics of Fluids 22, 043305 (2010).

  7. Henry K. Nahra, Y. Kamotani. Bubble formation from wall orifice in liquid cross-flow under low gravity // Chemical Engineering Science 55 (2000) 4653-4665

  8. Vorobyev M.A., Kashinskiy O.N., Lobanov P.D., Chinak A.V., Formation of the finely dispersed gas phase in upward and downward fluid flow. // Mekhanika Zhidkosti I Gasa 2012, Vol. 47, No. 4, pp. 75-81.

 

 
     

© SPIC "Kappa", LLC 2009-2016